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Potomac Weather Forecast

Temperature, wind, rain and more for Potomac

Maryland, United States Of America

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 12
Mar		01:00

SW
SW

 10 / 16 mph 69 / 69°F 78% 1005 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 19%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 16 / 22 mph 56 / 52°F 74% 1007 mb
Low level cloud: 98%
Mid level cloud: 88%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

 18 / 21 mph 39 / 30°F 90% 1011 mb
Low level cloud: 99%
Mid level cloud: 73%
High level cloud: 56%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
10:00

NNW
NNW

 14 / 19 mph 34 / 24°F 95% 1013 mb
Low level cloud: 94%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
13:00

NW
NW

 12 / 16 mph 33 / 24°F 99% 1015 mb
Low level cloud: 86%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
16:00

WNW
WNW

 9 / 13 mph 36 / 29°F 93% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

WNW
WNW

 9 / 16 mph 36 / 29°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 5 / 7 mph 35 / 31°F 85% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 13
Mar		01:00

WSW
WSW

 4 / 8 mph 32 / 28°F 86% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 74%
Most Significant Cloud Type: high
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 4 / 9 mph 32 / 28°F 88% 1021 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 9 / 14 mph 34 / 26°F 84% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 72%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 14 / 21 mph 38 / 30°F 77% 1017 mb
Low level cloud: 0%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 20 / 26 mph 45 / 37°F 70% 1011 mb
Low level cloud: 27%
Mid level cloud: 100%
High level cloud: 83%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 18 / 25 mph 51 / 44°F 64% 1007 mb
Low level cloud: 17%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 17 / 28 mph 50 / 44°F 65% 1007 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 15 / 26 mph 50 / 45°F 60% 1010 mb
Low level cloud: 10%
Mid level cloud: 58%
High level cloud: 1%
Most Significant Cloud Type: medium
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
The 7 day weather forecast summary for Potomac:

The outlook for Potomac in the week ahead shows the average daytime maximum temperature will be around 12°C, with a high for the week of 20°C expected on the morning of Thursday 12th. The mean minimum temperature will be 1°C, dipping to its lowest on the morning of Wednesday 18th at -3°C. The week ahead will have mixed overhead conditions with some days dry and some seeing a significant amount of rain, sleet or snow. Current predictions suggest Thursday 18th will have the most precipitation with an accumulation of around 30.0mm. On the whole winds are likely to be moderate.

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure